Water injector



Nov-.22, 1949 J. L. FRENCH 2,489,177

WATER INJECTOR Filed July 25, 1946 Patented Nov. 22, 1949 UN ITED STATES PATEN OFFICE WATER INJECTOR;

Jesse LsErench, Pondscreekaoklat Application July 23, 1946, Serial No. 685,753

4-(31aimsc (01. 103-54) This invention relates to an automatic water injector, or other liquids. The primary object or this invention is to provide a practical butcheap way of supercharging an internal combustion enegine-with water or otherliquids, to give them the performance of Diesel engine power witliout'los ing any of its higher speed, as water or. other liquids are injected into said cylinder after com bustion has taken place, therefore, will notslow up combustion in said cylinder of engine.

It is also an object of this invention to providean automatic injector of this kind which operates from combustion in cylinder to deliver the right amount of water or other liquids to properly supercharge said cylinder after combustion of gases has taken place.

This invention has a furtherobjectwhiohisto cause oil to adhere to piston rings, cylinder Walls] and valves by means of dampness in cylinder,; thereby lowering temperature andfriction.

A more particular object of this invention is:-

to provide an injectorincluding a valve normally closing the flow of liquids into combustion cylinder and which valve ismoved into open position by pressure of the explosion withinthe combustion chamber. a

It is a further object of this invention to lower cost of operation-of internal combustion engines, as the amount of power developed by injector; supercharger will lower amount oigas fuelused.

It is a still further object'of this inventionvto have an injector that will not interfere with normal operation of said combustion engine, when said injector has no liquids. There are just two moving parts to said injector.

It is an additional object of the invention to design two different check valves for said injector, such as the valve-shaped piston with rings for heavy duty engines and the ball-check for light-weight engines.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved water injector whereby certain important advantages are attained, as will be hereinafter more fully set forth.

In order that my invention may be better understood, I will now proceeds to describe the same with reference to the accompanying drawing, wherein is illustrated a view partly in section and partly in elevation of an injector constructed in accordance with an embodiment of the invention.

In the embodiment of the invention as illus- 2 a cylinder ofan internal combustion engine-in which-operates a reciprocatingpiston P. As the means for admitting the explosive charge within thecombustion chamber l of the cylinder 6 forms no part of the present invention, a detailed description and illustration therecf are believed to be unnecessary.

The head 2 of the cylinder C at its axial-center is provided with an opening 3 into which threads anend portion of an elongated valve cylinder or'sleeve 4 of desired dimensions; The inner end pcrtionof the wall of the cylinder or sleeve 4is increased in thickness, as at 5, to pro; ducean internal valve seat 6-with which en gages avalve memberM.

The valve member M, as herein disclosed, com-- prises a short tubular member 1 snugly fitting Within the cylinder or sleeve 4 and carryingsurrounding piston rings 8 to assure against leakagebetween themember l and the wall of the cylinder orsleeve 4.

The outer end of the tubular member 1 is" closedby the headil, hereindisclosed aswhavingan outer convex face, and the marginalportion of the head 9 is formed to provide an internal surrounding shoulder I0 with which contacts an expansible member I l of requisite tension and herein disclosed asa coil spring. The outer'end of this member or springll has contact with the inner face of the plug 12 which threads within the outer extremity of the cylinder or sleeve 4 and provides means whereby the tension of themem her or spring H may be regulated as the requirements of practice may necessitate.

The cylinder or sleeve 4 has an inner portion outwardly enlarged, as at I4, extending a desired distance along the cylinder or sleeve 4 and disposed through this enlargement I4 is a passageway |5, the outer end of which passageway 15 is in communication with the interior of the cylinder or sleeve 4 through a relatively large port l6 while the opposite or inner end portion of the passageway l5 has in communication therewith the restricted ports I! disposed through the wall of the cylinder or sleeve 4 and spaced lengthwise thereof.

Coacting with each of these restricted ports I! is a needle valve [8 threading through the wall of the enlarged portion l4. These needle valves l8 provide means whereby flow through the restricted ports Il may be regulated.

It is to be particularly noted that the lowermost port I1 meets with the cylinder or sleeve 4 at a point below the rings 8 when the valve memtrated in the accompanying drawings, C denotes her M is seated and also above but in close proxdiametrically opposed to the port [6, is provided with a port 19 in which is fitted an outstanding nozzle 20 carried by an end of a casing 2|. The

outer end portion of this casing 2| is provided with an internal valve seat 22 with which coacts the inwardly opening spring-pressed check valve 23. The casing 2| has suitably connected thereto a pipe line 24 leading from a suitable source of water supply.

In practice, the force of the explosion within the combustion chamber I of the cylinder C will result in an inward or opening movement of the valve member M, allowing a jet of water to enter the chamber I and thereby increase the effectiveness of the charge and which is particularly desirable in connection with heavy duty engines, such as tractors, etc.

It is to be stated that the member or spring ll initially has its tension adjusted by proper manipulation of the plug 12, so that the valve member will not leave its seat 6 during a low throttle or the idle operation of the engine but, as the force becomes greater, the valve member M will be lifted, thus allowing an increased amount of water to be discharged within the combustion chamber I.

It is believed to be obvious that the valve member M will automatically reseat itself.

From the foregoing description it is thought to be obvious that a water injector constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated.

I claim:

1. An injector for forcing liquid under pressure into the cylinder of an internal combustion, engine above the piston by the action of com-' bustion pressure in the cylinder, comprising a relatively long housing having an open end opening into the said combustion chamber and formed adjacent to the said open end to provide an internal valve seat, a valve member slidable in the housing, yieldable means for urging the valve member to said seat, means forming a bypass passage around the Valve member and opening at one end into the housing across the valve seat and opening at its other end into the housing behind the valve member, said valve member operating to close the said one end of the bypass and also the said open end of the housing when the valve member is on its seat, means for introducing liquid into the housing behind the valve member, and means for preventing reverse flow of liquid through the said introducing means.

2. An injector of the character stated in claim 1 in which the opposite end of the housing is closed by an inserted plug, said plug being retained by screw threads engaging corresponding I threads in the wall of the housing, and said yield- 1 wherein the opening of the said one end of the bypass passage into the housing is in the.

form of a needle valve seat, and a needle valve adjustably supported across the bypass passage and having its inner end disposed for engagement with the last mentioned valve seat.

4. An injector of the character stated in claim 1, with a further opening from the bypass passage into the housing at a point spaced longitudinally l of the housing from the said one end of the bypass passage, said further opening also being closed by the valve member at all times except when the valve member is open to its extreme position, and control valves for the said opening at the one end of the bypass passage and the said further opening.

JESSE L. FRENCH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,497,258 Beals June 10, 1924 2,389,492 Edwards Nov. 20, 1945 

